ipoctal: clear break interrupt as soon as it occurs

[firefly-linux-kernel-4.4.55.git] / drivers / ipack / devices / ipoctal.c

diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c
index 42700815d05fa716dc3b23252d34ef35879a086a..035d5449227e5158f370141a1a584d4b3aa39879 100644 (file)
--- a/drivers/ipack/devices/ipoctal.c
+++ b/drivers/ipack/devices/ipoctal.c
@@ -175,7 +175,6 @@ static void ipoctal_irq_rx(struct ipoctal_channel *channel, u8 sr)
                                flag = TTY_FRAME;
                        }
                        if (sr & SR_RECEIVED_BREAK) {
-                               iowrite8(CR_CMD_RESET_BREAK_CHANGE, &channel->regs->w.cr);
                                channel->stats.rcv_break++;
                                flag = TTY_BREAK;
                        }
@@ -220,6 +219,9 @@ static void ipoctal_irq_channel(struct ipoctal_channel *channel)
        isr = ioread8(&channel->block_regs->r.isr);
        sr = ioread8(&channel->regs->r.sr);
 
+       if (isr & (IMR_DELTA_BREAK_A | IMR_DELTA_BREAK_B))
+               iowrite8(CR_CMD_RESET_BREAK_CHANGE, &channel->regs->w.cr);
+
        if ((sr & SR_TX_EMPTY) && (channel->nb_bytes == 0)) {
                iowrite8(CR_DISABLE_TX, &channel->regs->w.cr);
                /* In case of RS-485, change from TX to RX when finishing TX.